B&R Servo Drive Overvoltage Failure How to Solve

The solution to a B&R servo drive overvoltage fault requires a combination of several aspects to ensure that the fault can be effectively resolved and normal operation of the drive restored. Below is a list of resolution steps based on current information and knowledge:

1. Fault Confirmation and Initial Inspection

Confirm the fault code :

Firstly, confirm whether B&R servo drive shows over-voltage fault code, such as E0520

Check the power supply voltage :

Use a voltmeter to measure the input voltage of the drive and confirm whether it exceeds the rated voltage range. Excessive supply voltage is a common cause of overvoltage faults.

2. Detailed inspection and diagnosis

Check the voltage sensor :

Check the bus voltage sensor for failure or abnormal operation, as a faulty sensor may result in a false alarm of overvoltage.

Check the braking circuit :

Check that the braking circuit is not damaged and that the braking resistor is not unconnected, damaged or open. Brake circuit problems may cause the voltage generated when the motor stops or reverses not to be released, causing an overvoltage.

Check the internal circuit :

If the supply voltage is normal and the sensor is not faulty, the internal circuitry of the drive may be faulty. At this point it is necessary to test the drive with an electronic test instrument to find the point of failure.

Check the load :

Excessive loads or braking too fast may also cause overvoltage. Check that the mechanical load is not too heavy and that the brakes are working properly.

3. Troubleshooting and Repair

Adjust the power supply voltage :

If the power supply voltage is too high, you need to adjust the power supply voltage to within the normal range. If adjustment is not possible, it may be necessary to install a suitable voltage stabiliser.

Replace the faulty components :

Replace the damaged voltage sensor, braking resistor or other faulty components according to the inspection results.

Repair internal circuitry :

If the internal circuitry is faulty, it will be necessary to repair or replace components such as circuit boards. This may require a specialised technician to carry out the operation.

Adjust loads and brakes :

If the load is too heavy or the brakes are too fast resulting in overpressure, the load needs to be adjusted or the braking system optimised.

4. Preventive measures and routine maintenance

Regular Inspection :

Regularly inspect and maintain the servo drive, including the power supply voltage, sensors, braking circuit and internal circuits.

Set appropriate parameters :

Set appropriate drive parameters, such as over-voltage protection thresholds, according to actual use to improve system stability and safety.

Optimise the working environment :

Ensure that the working environment of the servo drive is good and avoid unfavourable factors such as electromagnetic interference and high temperature.

Training and awareness raising :

Train operators and maintenance personnel to improve their ability to judge and handle servo drive failures. At the same time to enhance safety awareness, to avoid failure due to improper operation.

Summary: In summary, to solve the B&R servo drive overvoltage faults need to take into account a number of aspects, from fault confirmation, detailed inspection, troubleshooting to preventive measures and routine maintenance need to be carefully implemented. In practice, the solution should be flexibly adjusted according to the specific situation.